Facebook is now back, together with Instagram, WhatsApp and Messenger. After more than 6 hours of being down, the social media giant explained that the cause of the outage is a “configuration changes on the backbone routers that coordinate network traffic between our data centers caused issues that interrupted this communication. This disruption to network traffic had a cascading effect on the way our data centers communicate, bringing our services to a halt.”

Facebook with Messenger, Instagram and Whatsapp went down last night leaving billions of users unable to communicate and unreachable, especially those who only exclusively use the services by the social media giant.

Mark Zuckerberg also posted an apology;

Facebook’s explanation did not provide much details on the outage, which to most of its users won’t even care about, as long as the service is back online.